Linker Error When Building gnat 4.6.0

[Shea Levy]

On 03/29/2011 03:00 PM, Ian Lance Taylor wrote:
> shea@shealevy.com writes:
>
>> When trying to build GCC 4.6.0 with Ada support, I get the following error:
>>
>> ld: ../libiberty/pic/libiberty.a(simple-object-coff.o): relocation
>> R_X86_64_PC32 against undefined symbol `simple_object_set_big_16' can not
>> be used when making a shared object; recompile with -fPIC
>> ld: final link failed: Bad value
>> make[4]: *** [liblto_plugin.la] Error 1
>>
>> It was my understanding that the pic/ subdirectory of libiberty/ was for a
>> PIC version of libiberty. This error occurs whether I explicitly export
>> -fPIC in CFLAGS or not. I have been able to build GCC 4.6.0 successfully
>> without Ada.
> The cases where I have seen this are where somebody runs configure, runs
> make, and then runs configure again in the same directory in a way that
> changes whether the PIC version of libiberty needs to build.  Is it
> possible that that happened here?
>
> Ian

I'm fairly certain this isn't happening, I automate my builds and start 
with a fresh unpacking each time. I've looked through the build logs, 
and I don't see any configure-like output after building starts. Also, 
there is a file libiberty/pic/libiberty.a after the build failure, 
though I don't know how to check if it has been built with PIC.